Adjustable square and miter



i atentcd Sept. l9, i922.

l ilzdfit FFEQE.

ROSCOE lt. PAFFORD, OF WICHITA FALLS, TEXAS.

ADJUSTABLE sevens Ann MITER.

Application filed January 9, 1920, Serial No. 350,397. Renewed March 17,1922. Serial No. 544,693.

To all whom it may concern:

Be it known that I, Roscoe R. PArroRD, a citizen of the United States,residing at Vi ichita Falls, in the county of lVichita and State ofTexas, have invented certain new and useful Improvements in AdjustableSquares and Miters, of which the following is a specification.

The invention has for an object to effect improvements in adjustablesquares and miters, and aims particularly to effect improvements in theclamping devices for adjustable members in such appliances. An importantaim of this invention is to provide securing means for adjustablemembers which will be contained within elements of the device, so as tobe protected against casual operation or disturbance. It is a furtheraim to give a construction in the adjustable parts and the clampingmeans which will insure strength and security in the relation of theparts.

Additional objects, advantages and features of invention may appear fromthe construction, arrangement and combination of parts hereinafterdescribed and shown in the drawings, wherein Figure 1 is a fragmentaryside view of a combination IT-square and miter, constructed inaccordance with my invention,

Fig. 2 is a similar view showing one of the adjustable miter elementsfree, and moved from closed position,

Fig. 3 is a fragmentary longitudinal section on the line 38 of Fig. 1.

Fig. 4 is a fragmentary perspective view of one of the miter elements.

Fig. 5 is a cross sectional view of the stem of the device on the line55 of Fig. 3.

Fig. 6 is a perspective View of one of the clamping devices.

There is illustrated a tool comprising a stem or body port-ion 10, whichincludes two edge rails 11 with a connecting web portion 12 therebetweengiving this part oi the device somewhat the shape of the letter I incross section. The body portion 10 may be formed of metal if desired, orpartly of metal and partly of wood, as found preferably. Adjacent thehead of the stem an opening 13 is formed therethrough, into which areprojected clamping screws 14, two on each side of the mediallongitudinal plane of the body, and a central screw 15,

the latter being slidable centrally through the end portion of the body10 longitudh nally, while the first mentioned screws are formedintegrally with the body 10, or may be secured thereto. Upon theprojected ends of the screws 14 and 15 within the opening 13, there areengaged thumb nuts 17. At their opposite ends, the screws 14 and 15 areformed with lateral bills 18, projected at right angles to the screws,the purpose of which will become apparent. The end of the body 10adjacent the parts last mentioned is provided with a kerf or channel 19thereacross in the medial plane of the body 10 and the bottom of thechannel is formed accurately at right angles to the longitudinal axis ofthe body 10. Slidable in the kerf there is a blade 20 having a slot orchannel 21 in one side receiving the bill of the screw 15. In thismanner the blade 20 may be adjusted to project at any desired length ateither side of the body 10. Miter arms 23 are pivoted on the body 10beside the blade 20, these arms being four in number. Each of them isL-shaped in cross section its flanges being projected over the faces ofthe adjacent rail 11. They are pivoted at the ends of the body 10 whichextends across the blade 20 for the major portion of its width. Carriedby the arms 23 there are sectors 24, engaged through slots formed in therails 10, each sector having a slot 25 therein concentric with thecenter of the sector, in which the bill 18 of a respective screw 14 isengaged. The head portion 26 of the body 10, located outwardly of theopening 13 is recessed to receive one of the sectors 24, while the otherone slides freely over the surface of the head portion between therails. A suitable scale is formed on each sector coordinated with theinner edge of the rail 11 thereadjacent so that the point at which theedge of the rail intersects the scale will indicate the angle at whichthe attached arm 23 is disposed With respect to the body 10 at anyposition in its movement.

By the use of the nut 17, the miter arm 23 may be secured in closedposition as well as at any adjusted position. The screws 14 engage overthe sectors 24, so that the latter are held against displacement fromtheir positions against the head portion 26.

What is claimed: 1. An adjustable square and miter comprising a bodyportion having a sl dable blade ther aeross formed With a lqngl I a bodyelement having a head portion With a finger opening therethrough, amiter arm pivoted'on the body and having a' sector respective membersenplate slidable through the body, a sleeve on the body, a longitudinalscrew reciprocable in the sleeve and having a laterally turned bill,said sector plate being slotted concentrically with the pivot of saidmiter arm and receiving said bill in the slot for clamping-the sector,and a nut on said screw Within the finger opening by Which said bill maybe drawn into clamping engagement With one edge of said slot. I I

In testimony whereof I have affixed. my signature in presence of twoWitnesses.

ROSCOE R. PAFFORD. Witnesses:

DOROTHY DEAN,

KATE M. PATTON.

